A jogger covers a distance of 18 km in 2 hours. If he runs at 1.5 times his original speed, how much time will he take to cover a distance of 27 km? MCQ with Answer and Explanation
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Question #1
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A man covers 1/3rd of his journey at 20 km/h and the remaining 2/3rd at 40 km/h. If the total distance is 120 km, find the total time taken for the journey.
Correct Answer: Option C
Explanation:
First part distance = 120 / 3 = 40 km. Time1 = 40 / 20 = 2 hours. Remaining distance = 80 km. Time2 = 80 / 40 = 2 hours. Total time = 2 + 2 = 4 hours.
First part distance = 120 / 3 = 40 km. Time1 = 40 / 20 = 2 hours. Remaining distance = 80 km. Time2 = 80 / 40 = 2 hours. Total time = 2 + 2 = 4 hours.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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The speeds of two cars are in the ratio 5 : 4. If they cover the same distance, and the slower car takes 2.5 hours, how much time does the faster car take?
Correct Answer: Option C
Explanation:
Ratio of speeds = 5:4, so ratio of times taken = 4:5. The slower car corresponds to 5 parts = 2.5 hours => 1 part = 0.5 hours. Time for the faster car = 4 parts = 4 * 0.5 = 2 hours.
Ratio of speeds = 5:4, so ratio of times taken = 4:5. The slower car corresponds to 5 parts = 2.5 hours => 1 part = 0.5 hours. Time for the faster car = 4 parts = 4 * 0.5 = 2 hours.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A train 150 meters long is running at a speed of 90 km/h. How long will it take to cross a platform 200 meters long?
Correct Answer: Option D
Explanation:
Speed of train = 90 * (5/18) = 25 m/s. Total distance = 150 + 200 = 350 meters. Time taken = 350 / 25 = 14 seconds.
Speed of train = 90 * (5/18) = 25 m/s. Total distance = 150 + 200 = 350 meters. Time taken = 350 / 25 = 14 seconds.
This question belongs to:
Maths
Time Speed and Distance
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